David K. Joyce

Rare Minerals

Unusual and rare minerals that I felt would be better here than in some other category! :)

All prices in Canadian dollars. For payment in US$, deduct 21% or multiply by 0.79.

Click on any of the following thumbnails to view a larger image of the specimen.

Item #4382 Probertite 6.3x2.0x0.7 cm Largest Crystal Size: n/a $25.00 Cheverie Nova Scotia, Canada White aggregates and needles of probertite are present on one end of this thin gypsum fragment. Nice!	Item #21935 Vuagnatite, Mcguinnessite 6.4x5.0x2.1 cm Largest Crystal Size: 1mm $75.00 Ukiah Mendocino County California, USA The top of this plate is largely covered with transluscent, white-colourless vuagnatite crystals (some very sharp!) and green, hemispheres of greenish mcguinnessite. Nice combination!	Item #15007 Semenovite-(Ce), Epididymite 6.5x4.4x2.2 cm Largest Crystal Size: micro $75.00 Taseq Ilimaussaq Greenland A couple of isolated, well formed semenovite crystals are present in a vug mostly lined with excellent, colourless, epididymite crystals.	Item #21931 Merwinite 5.5x3.2x1.4 cm Largest Crystal Size: 1mm $35.00 Crestmore Quarry Riverside County California, USA Whitish crystals of this unusual calc-silicate mineral are embedded in this piece. Unusual.
Item #21926 Zunyite 6.6x4.3x2.8 cm Largest Crystal Size: 1mm $75.00 Big Bertha Mine Quartzite Arizona, USA This fragment of quartz.mica matrix contains many hundreds of colourless to beigey zunyite crystals. The crystals are very well formed and are, generally, combinations of cube and octahedron with the octahedron dominating some times. Rich sample with many sharp crystals.	Item #20931 Thomsenolite, Siderite, Sphalerite, Ralstonite 12.4x9.0x7.5 cm Largest Crystal Size: 6mm $425.00 Ivigtut Deposit Ivittuut, Arsuk Fjord Greenland There are cavities all over this specimen that are lined with superb, elongated, terminated thomsenolite crystals. Of course as is usually the case, the thomsenolite is white but has a light coating of iron oxide that give the specimen its classic look. Matrix appears to me massive thomsenolite with a few small siderite and sphalerite crystals embedded in it. As well, there are small cube-octahedral ralstonite crystals on the thomsenolite crystals, inside the vugs. We don't seem much of this material around any more!	Item #21932 Cornubite 3.5x2.9x2.2 cm Largest Crystal Size: micro $55.00 Hardshell Mine Santa Cruz County Arizona, USA Lots of tiny, green crystals of this rare copper arsenate in and on the gossanous matrix of this piece.	Item #21959 Raite 3.8x2.8x2.0 cm Largest Crystal Size: micro $65.00 Indian Mountain Kola Peninsula Russia There are many open spaces in this matrix that reveal beautiful crystal sprays of the rare Sodium-manganese-titanium silicate raite. There are supposed to be zorite crystals(?) in the cavities as well but I cannot recognize them. Maybe you can?! Very nice raite!
Item #21937 Carparthite 7.0x6.0x5.1 cm Largest Crystal Size: 6mm $65.00 Picacho Mine San Benito Co. California, USA This specimen has some openings that contain yellowish crystals of this unusual mineral that is composed of just carbon and hydrogen! Some nice crystals here!	Item #21945 Strengite 4.3x2.5x1.6 cm Largest Crystal Size: 0.5mm $40.00 Indian Mountain Cherokee County Alabama, USA Beautiful well formed crystals are present both on the darker oxide matrix and as thicker covering on the other side of the specimen. Not all crystals are undamaged but there are many that are perfect and excellent for photography!	Item #21951 Kleinite 5.8x3.0x3.2 cm Largest Crystal Size: 1.5mm $65.00 McDermit Humboldt County Nevada, USA Much of the front of this specimen is covered with rough but coherent crystals of kleinite. When I fist saw this mineral, I thought perhaps it was a uranium mineral, it is so yellow. No, it is a mercury mineral. Rare!	Item #21955 Felsobanyaite, Gypsum 3.7x2.8x2.8 cm Largest Crystal Size: n/a $40.00 Chickerell Dorset England OK, it is not pretty! It IS unusual, though! White aggregates of this unusual aluminum sulfate mineral intermixed with elongated growths of gypsum. Was labelled originally as "basaluminite", which is a pseudonym for felsobanyaite. Unusual!
Item #21961 Ussingite 4.7x4.3x3.2 cm Largest Crystal Size: n/a $65.00 Mt. Punkurauj Chibiny Massif, Kola Peninsula Russia A fragment of massive ussingite ranging from light mauve to purple. Rich!	Item #21979 Arrojadite 8.0x5.9x1.1 cm Largest Crystal Size: 4mm $110.00 Rapid Creek Yukon, Canada A plate of crystals of both quartz and arrojadite. The arrojadite crystals are sharp, well formed crystals that cover 40-50% of the top of this plate with quartz crystals covering the rest. Nice!	Item #21991 Tellurobismuthite 5.6x5.1x3.5 cm Largest Crystal Size: 2mm cleavage $45.00 Fyresdal Norway Lots of bright, lustrous cleavages of this unusual telluride scattered throughout this quartz matrix. Rich!	Item #21992 Brewsterite, Baryte 3.5x3.4x2.2 cm Largest Crystal Size: 2mm $35.00 Strontian Argyllshire Scotland This thick plate has its top covered with white crested baryte crystals which have a generous sprinkling of sharp brewsterite crystals. There is sphalerite or wurtzite embedded in the matrix. From the type locality!
Item #22167 Clinoptilite-Ca 3.7x3.7x2.3 cm Largest Crystal Size: 2mm $45.00 Succor Creek Oregon, USA This geode-like, quartz nodule is hollow and completely lined with tabular, sharp, gemmy clinoptilite crystals. Excellent!	Item #22548 Sarabauite, Stibnite 6.2x4.5x1.7 cm Largest Crystal Size: n/a $55.00 Sarabau Mine Sarawak, Borneo Malaysia Rich, red sarabauite is associated with metallic stibnite, both being embedded in calcite and wollastonite. This is the type locality for this unusual antimony mineral!	Item #22655 Euxenite 1.9x1.3x0.5 cm Largest Crystal Size: as above $55.00 Ankazobe Madagascar A flattened cluster of slightly radioactive euxenite crystals. The crystals have a thin creamy alteration coating and an interior of resinous dark brown.	Item #22656 Mendipite 3.7x2.2x1.2 cm Largest Crystal Size: n/a $45.00 Merehead Quarry Mendip, Somerset England A solid zone of mendipite, the rare lead oxy-chloride mineral from the type locality.
Item #22676 Jamborite, Siderite 11.8x7.8x3.8 cm Largest Crystal Size: 3mm $75.00 Sterling Mine Antwerp New York, USA Sharp, acicular pseudomorphs of jamborite after millerite are tucked away here and there in interstices of this wide, shallow siderite crystal pocket. Classic Sterling Mine! R	Item #22705 Hausmannite 3.2x2.2x1.7 cm Largest Crystal Size: 8mm $35.00 Kuruman N. Cape Province South Africa Very sharp, pseudo-octahdral crystals of this tetragonal manganese oxide are perched nicely on this matrix. Very good example!	Item #22797 Dawsonite, Calcite 16.0x6.0x3.6 cm Largest Crystal Size: 7mm $65.00 St. Bruno Quebec, Canada Masses of dawsonite fibers are present in fracture in this apparent limestone matrix. openings in the rock are lined with calcite rhombs. Unusual! R	Item #24683 Hinsdalite 7.5x3.5x2.9 cm Largest Crystal Size: 3mm $75.00 Sylvester Mine Zeehan, Tasmania Australia Elongated, hexagonal laths of pure white hinsdalite, very similar to specimens illustrated on mindat.org. Nice specimen of a relatively rare mineral!